bit_cost.h - mozsearch

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/* Copyright 2013 Google Inc. All Rights Reserved.

   Distributed under MIT license.

   See file LICENSE for detail or copy at https://opensource.org/licenses/MIT

*/

/* Functions to estimate the bit cost of Huffman trees. */

#ifndef BROTLI_ENC_BIT_COST_H_

#define BROTLI_ENC_BIT_COST_H_

#include "../common/platform.h"

#include "histogram.h"

#if defined(__cplusplus) || defined(c_plusplus)

extern "C" {

#endif

BROTLI_INTERNAL double BrotliBitsEntropy(

    const uint32_t* population, size_t size);

BROTLI_INTERNAL double BrotliPopulationCostLiteral(

    const HistogramLiteral* histogram);

BROTLI_INTERNAL double BrotliPopulationCostCommand(

    const HistogramCommand* histogram);

BROTLI_INTERNAL double BrotliPopulationCostDistance(

    const HistogramDistance* histogram);

#if defined(__cplusplus) || defined(c_plusplus)

}  /* extern "C" */

#endif

#endif  /* BROTLI_ENC_BIT_COST_H_ */